this is an okay supplement but people with a tendency for mood swings might wanna consider something else. all the picolinic forms of minerals have given me sleeping problems + more until i figured and eliminated them completely from my routine. so far i've only found circa one study and a couple of sources confirming this (and i had to look). with all the bravado that goes into pushing picolinates as the "safest" form one should really research supplements thoroughly before ordering. i also do not appreciate the silicon dioxide and aspartic acid in these caps, they may be more or less hypoallergenic but i'd rather have an allergic reaction (after all a natural indicator body wise) than stuffing myself with slow poisons, which these chemicals literally are.